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export { EventCreator }
import { VEvent } from './vevent'
import { v4 as uuid } from 'uuid'
import { ComponentBlock } from './components/vevent-block'
import { round_time, parseDate } from './lib'
import { ical_type } from './types'
/**
Class managing the state while creating events.
This is mainly for, when in the UI, the user starts to create events by
dragging on the calendar.
*/
class EventCreator {
/** Event which we are trying to create */
ev?: VEvent
/** Graphical block for event. Only here so we can find its siblings, and
update pointer events accordingly */
event?: Element
/**
Where the mouse down for the event started.
This is here to check if the user is actually dragging, or just randomly
clicking on the background with a shaky hand.
There are some constants in the code for what a shaky hand means
(currently less than 10 pixels in X, or 5 in Y)
*/
#event_start: { x: number, y: number } = { x: NaN, y: NaN }
#down_on_event: boolean = false
#time_start: number = 0
/**
Event handler for `mosedown` events.
*/
create_event_down(intended_target: HTMLElement): (e: MouseEvent) => any {
let that = this;
return function(e: MouseEvent) {
/* Only trigger event creation stuff on actuall events background,
NOT on its children */
that.#down_on_event = false;
if (e.target != intended_target) return;
that.#down_on_event = true;
that.#event_start.x = e.clientX;
that.#event_start.y = e.clientY;
}
}
/**
Event handler for `mousemove` events.
@param pos_in
TODO
@param round_to
what start and end times should round to when dragging, in fractionsb of
the width of the containing container.
@param wide_element
Does the element expect to grow horizontally (`true`) or vertically
(`false`).
TODO limit this to only continue when on the intended event_container.
(event → [0, 1)), 𝐑, bool → event → ()
*/
create_event_move(
pos_in: ((c: HTMLElement, e: MouseEvent) => number),
round_to: number = 1,
wide_element: boolean = false
): ((e: MouseEvent) => void) {
let that = this;
return function(this: HTMLElement, e: MouseEvent) {
if (e.buttons != 1 || !that.#down_on_event) return;
/* Create event when we start moving the mouse. */
if (!that.ev) {
/* Small deadzone so tiny click and drags aren't registered */
if (Math.abs(that.#event_start.x - e.clientX) < 10
&& Math.abs(that.#event_start.y - e.clientY) < 5) { return; }
/* only allow start of dragging on background */
if (e.target !== this) return;
/* only on left click */
if (e.buttons != 1) return;
// let [popup, event] = that.create_empty_event();
// that.event = event;
that.ev = new VEvent();
that.ev.setProperty('uid', uuid())
that.ev.calendar = window.default_calendar;
// let ev_block = document.createElement('vevent-block') as ComponentBlock;
let ev_block = new ComponentBlock(that.ev.getProperty('uid'));
ev_block.classList.add('generated');
that.event = ev_block;
that.ev.register(ev_block);
/* TODO better solution to add popup to DOM */
// document.getElementsByTagName("main")[0].append(popup);
/* [0, 1) -- where are we in the container */
/* Ronud to force steps of quarters */
/* NOTE for in-day events a floor here work better, while for
all day events I want a round, but which has the tip over point
around 0.7 instead of 0.5.
It might also be an idea to subtract a tiny bit from the short events
mouse position, since I feel I always get to late starts.
*/
// that.event.dataset.time1 = '' + time;
// that.event.dataset.time2 = '' + time;
/* ---------------------------------------- */
this.appendChild(ev_block);
/* requires that event is child of an '.event-container'. */
// new VComponent(
// event,
// wide_element=wide_element);
// bind_properties(event, wide_element);
/* requires that dtstart and dtend properties are initialized */
/* ---------------------------------------- */
/* Makes all current events transparent when dragging over them.
Without this weird stuff happens when moving over them
This includes ourselves.
*/
for (let e of this.children) {
(e as HTMLElement).style.pointerEvents = "none";
}
that.#time_start = round_time(pos_in(this, e), round_to);
}
let time = round_time(pos_in(this, e), round_to);
// let time1 = Number(that.event.dataset.time1);
// let time2 = round_time(
// pos_in(that.event.parentElement!, e),
// round_to);
// that.event.dataset.time2 = '' + time2
/* ---------------------------------------- */
let event_container = this.closest(".event-container") as HTMLElement;
/* These two are in UTC */
let container_start = parseDate(event_container.dataset.start!);
let container_end = parseDate(event_container.dataset.end!);
/* ---------------------------------------- */
/* ms */
let duration = container_end.valueOf() - container_start.valueOf();
let start_in_duration = duration * Math.min(that.#time_start, time);
let end_in_duration = duration * Math.max(that.#time_start, time);
/* Notice that these are converted to UTC, since the intervals are given
in utc, and I only really care about local time (which a specific local
timezone doesn't give me)
*/
/* TODO Should these inherit UTC from container_*? */
let d1 = new Date(container_start.getTime() + start_in_duration)
let d2 = new Date(container_start.getTime() + end_in_duration)
let type: ical_type = wide_element ? 'date' : 'date-time';
that.ev.setProperties([
['dtstart', d1, type],
['dtend', d2, type],
]);
// console.log(that.event);
// console.log(d1.format("~L~H:~M"), d2.format("~L~H:~M"));
}
}
/**
Event handler for `mouseup` events.
TODO callback?
TODO return value?
*/
create_event_finisher(callback: ((ev: VEvent) => void)) {
let that = this;
return function create_event_up(_: MouseEvent) {
if (!that.ev) return;
/* Restore pointer events for all existing events.
Allow pointer events on our new event
*/
for (let e of (that.event as Element).parentElement!.children) {
(e as HTMLElement).style.pointerEvents = "";
}
let localevent = that.ev;
that.ev = undefined
that.event = undefined;
callback(localevent);
}
}
}
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